// Copyright 2015 Microsoft Corporation. All rights reserved.
// This code is governed by the license found in the LICENSE file.

/*---
description: Elements are updated after the call to from
esid: sec-array.from
---*/

function Test() {
    var array = [127, 4, 8, 16, 32, 64, 128];
    var arrayIndex = -1;

    function mapFn(value, index) {
      arrayIndex++;
      if (index + 1 < array.length) {
        array[index + 1] = 127;
      }
      assert.sameValue(value, 127, 'The value of value is expected to be 127');
      assert.sameValue(index, arrayIndex, 'The value of index is expected to equal the value of arrayIndex');

      return value;
    }

    var a = Array.from(array, mapFn);
    assert.sameValue(a.length, array.length, 'The value of a.length is expected to equal the value of array.length');
    for (var j = 0; j < a.length; j++) {
      assert.sameValue(a[j], 127, 'The value of a[j] is expected to be 127');
    }
}

// preheat
const NUMBER_OF_PREHEAT = 1;
for (let i = 0; i < NUMBER_OF_PREHEAT; i++) {
    Test();
}

ArkTools.jitCompileAsync(Test);
assert.sameValue(ArkTools.waitJitCompileFinish(Test), true, '[JIT] JIT disabled.');

// test
const NUMBER_OF_TEST = 1; // or 2
for (let i = 0; i < NUMBER_OF_PREHEAT; i++) {
    Test();
}
